package Iterator;

/**
 * @Author zhangjinxi
 * @Date: Created in 15:38 2018/3/1
 * @Description:
 */
public interface Iterator {

    /*前移*/
    public Object previous();

    /*后移*/
    public Object next();

    /*是否有下个元素*/
    public boolean hasNext();

    /*取得第一个元素*/
    public Object first();

}
